loo_path <- loo('path.to.citizenship.followup', 
                          'path.to.citizenship.baseline')
loo_immg <- loo('legal.immigration.followup', 
                          'legal.immigration.baseline')
loo_trus <- loo('trust.followup', 'trust.baseline')
loo_appr <- loo('approval.followup', 'approval.baseline')
loo_vint <- loo('vote.followup', 'vote.baseline')
loo_actv <- loo('vote.november', 'vote.baseline')